Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad83bc954b73519f37acec151e084518225e2ce7754966e902563cc37d916d25' 
  AND token = 'qI5uw25592W3cIqwG/drJwGTvi2AQmXF2v31swGwxlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}